**What are Four Digit Numbers?**

We may divide 4-digit numbers in 9 groups.

(i) **1000 to 1999** (one thousand to one thousand nine hundred ninety nine)

(ii) **2000 to 2999** (two thousand to two thousand nine hundred ninety nine)

(iii) **3000 to 3999** (three thousand to three thousand nine hundred ninety nine)

(iv) **4000 to 4999** (four thousand to four thousand nine hundred ninety nine)

(v) **5000 to 5999** (five thousand to five thousand nine hundred ninety nine)

(vi) **6000 to 6999** (six thousand to six thousand nine hundred ninety nine)

(vii) **7000 to 7999** (seven thousand to seven thousand nine hundred ninety nine)

(viii) **8000 to 8999** (eight thousand to eight thousand nine hundred ninety nine)

(ix) **9000 to 9999** (nine thousand to nine thousand nine hundred ninety nine)

**Note: **Four digit numbers begin with 1000.

If all the numbers of one digit, then two digits and then three digits are placed step by step to the right of 1 Thousand according to their place values, the numbers from 1001 to 1999 are formed.

1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 1009, 1010, 1011, 1012, 1013, 1014, 1015, 1016, 1017, 1018, 1019, 1020, 1021, 1022, 1023, 1024, 1025, 1026, 1027, 1028, 1029, 1030, 1031, 1032, 1033, 1034, 1035, 1036, 1037, 1038, 1039, 1040, 1041, 1042, 1043, 10144, 1045, 1046, 1047, 1048, 1049, 1050, 1051, 1052, 1053, 1054, 1055, 1056, 1057, 1058, 1059, 1060, 1061, 1062, 1063, 1064, 1065, 1066, 1067, 1068, 1069, 1070, 1071, 1072, 1073, 1074, 1075, 1076, 1077, 1078, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086, 1087, 1088, 1089, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098, 1099, 1110, 1111, …………………., 1199, 1200, …………………., 1299, 1300, 1301, …………………………., 1399, 1400, …………………, 1499, 1500, 1501, …………………., 1899, 1900, 1901, ………………….., 1921, …………………., 1971, …………………., 1981, ………………………, 1991, …………………., 1999. Similarly, 2000, …………….., 2199, ………………….., 2299, ……………………, 2799, ……………………, 2899, ………………….., 2999 are formed. Thus, we reach upto 3999, ……………….., 4999, …………………, 5999, …………………, 6999, …………………, 7999, …………………, 8999, ………………….., 9999.

**Shown below are some
four digit numbers on the abacus:**

2354 Two thousand three hundred fifty four |
5241 Five thousand two hundred forty one |

Mike has 999 lollipops. He has made 9 packets of 100 lollipops in each. He is now left with 99 lollipops. How many more lollipops does Mike need to make another packet of 100 lollipops?

**99 + 1 = 100**

By having 1 more lollipop, Mike can make another packet of 100 lollipops.

Mike has now 10 packets of 100 lollipops in each.

10 hundreds = 1 thousand = 1000 Thus, Mike has 1000 lollipops in all. 1000 is a 4-digit number and is read as ‘one thousand’. |
1 packet = 100 lollipops 2 packets = 100 + 100 = 200 lollipops 3 packets = 200 + 100 = 300 lollipops 4 packets = 300 + 100 = 400 lollipops 5 packets = 400 + 100 = 500 lollipops 6 packets = 500 + 100 = 600 lollipops 7 packets = 600 + 100 = 700 lollipops 8 packets = 700 + 100 = 800 lollipops 9 packets = 800 + 100 = 900 lollipops |

1000 is the smallest 4-digit number. 9999 is the largest 4-digit number.

One-digit Two-digit Three-digit Four-digit |
9 99 999 9999 |
0 10 100 1000 |

9 + 1 = 10

99 + 1 = 100

999 + 1 = 1000

Let us now learn some 4-digit number names.

1325 is read as ‘One thousand three hundred twenty-five’ | ||

1538 is read as ‘One thousand five hundred thirty-eight’ | ||

1243 is read as ‘One thousand two hundred forty-three’ | ||

1456 is read as ‘One thousand four hundred fifty-six’ | ||

1513 is read as ‘One thousand five hundred thirteen’ | ||

1204 is read as ‘One thousand two hundred four’ | ||

1331 is read as ‘One thousand three hundred thirty-one’ | ||

1355 is read as ‘One thousand three hundred fifty-five’ | ||

2043 is read as ‘Two thousand forty-three’ |

**Note:** 1. The largest 4-digit number is 9999.

2. The smallest 4-digit number is 1000.

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